:root{
  --bg:#05070a;
  --bg-2:#080c12;
  --panel:rgba(255,255,255,.035);
  --line:rgba(255,255,255,.09);
  --txt:#e8f0ee;
  --muted:#8593a0;
  --acid:#7dffb3;
  --acid-2:#26e0a6;
  --cyan:#5ad1ff;
  --violet:#9a8cff;
  --font:'Space Grotesk',system-ui,sans-serif;
  --display:'Syne',sans-serif;
  --mono:'JetBrains Mono',monospace;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:var(--bg);
  color:var(--txt);
  font-family:var(--font);
  overflow-x:hidden;
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
  cursor:none;
}
a{color:inherit;text-decoration:none}
::selection{background:var(--acid);color:#04150d}

/* ---------- canvas background ---------- */
#helix{position:fixed;inset:0;width:100%;height:100%;z-index:0;opacity:.9}
.grain{position:fixed;inset:0;z-index:1;pointer-events:none;opacity:.05;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");}
.vignette{position:fixed;inset:0;z-index:1;pointer-events:none;
  background:radial-gradient(120% 120% at 50% 0%,transparent 55%,rgba(0,0,0,.55) 100%)}

/* ---------- custom cursor ---------- */
.cursor-dot,.cursor-ring{position:fixed;top:0;left:0;z-index:9999;pointer-events:none;border-radius:50%;
  transform:translate(-50%,-50%);mix-blend-mode:difference}
.cursor-dot{width:7px;height:7px;background:var(--acid)}
.cursor-ring{width:38px;height:38px;border:1px solid rgba(255,255,255,.5);
  transition:width .25s,height .25s,background .25s,border-color .25s}
.cursor-ring.hov{width:62px;height:62px;background:rgba(125,255,179,.12);border-color:var(--acid)}
@media (hover:none){.cursor-dot,.cursor-ring{display:none}body{cursor:auto}}

/* ---------- layout shell ---------- */
.wrap{position:relative;z-index:2;max-width:1180px;margin:0 auto;padding:0 28px}

/* ---------- nav ---------- */
nav{position:fixed;top:0;left:0;right:0;z-index:50;
  display:flex;align-items:center;justify-content:space-between;
  padding:20px clamp(20px,4vw,46px);
  transition:background .4s,backdrop-filter .4s,padding .4s}
nav.scrolled{background:rgba(5,7,10,.6);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);padding-top:14px;padding-bottom:14px}
.brand{font-family:var(--display);font-weight:800;letter-spacing:.5px;font-size:1.05rem}
.brand span{color:var(--acid)}
.navlinks{display:flex;gap:30px;font-size:.82rem;letter-spacing:.04em;color:var(--muted)}
.navlinks a{position:relative;transition:color .3s}
.navlinks a::after{content:"";position:absolute;left:0;bottom:-6px;width:0;height:1px;background:var(--acid);transition:width .3s}
.navlinks a:hover{color:var(--txt)}
.navlinks a:hover::after{width:100%}
@media(max-width:720px){.navlinks{display:none}}

/* ---------- hero ---------- */
header.hero{min-height:100vh;display:flex;flex-direction:column;justify-content:center;position:relative}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-family:var(--mono);font-size:.74rem;
  letter-spacing:.18em;text-transform:uppercase;color:var(--acid);margin-bottom:26px}
.eyebrow::before{content:"";width:34px;height:1px;background:var(--acid)}
.pulse{width:8px;height:8px;border-radius:50%;background:var(--acid);box-shadow:0 0 0 0 rgba(125,255,179,.7);animation:pulse 2s infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(125,255,179,.6)}70%{box-shadow:0 0 0 12px rgba(125,255,179,0)}100%{box-shadow:0 0 0 0 rgba(125,255,179,0)}}

/* FIXED: hero title — was clamp(3.1rem,11vw,9.2rem) which is ~147px at 16px base */
h1.title{font-family:var(--display);font-weight:700;line-height:.92;
  font-size:clamp(2.8rem,6vw,5.5rem);letter-spacing:-.02em;text-transform:uppercase}
h1.title .ln{display:block;overflow:hidden}
h1.title .ln span{display:block;transform:translateY(110%);
  animation:rise 1s cubic-bezier(.16,1,.3,1) forwards}
h1.title .ln:nth-child(2) span{animation-delay:.12s}
.title .out{-webkit-text-stroke:1.4px var(--acid);color:transparent}
@keyframes rise{to{transform:translateY(0)}}

.hero-sub{margin-top:34px;max-width:560px;color:var(--muted);font-size:1.05rem;
  opacity:0;animation:fade 1s ease .5s forwards}
.hero-meta{margin-top:42px;display:flex;flex-wrap:wrap;gap:14px;
  opacity:0;animation:fade 1s ease .7s forwards}
.chip{font-family:var(--mono);font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;
  padding:9px 16px;border:1px solid var(--line);border-radius:40px;color:var(--txt);
  background:var(--panel);transition:border-color .3s,color .3s,transform .3s}
.chip:hover{border-color:var(--acid);color:var(--acid);transform:translateY(-3px)}
@keyframes fade{to{opacity:1}}

.scrollcue{position:absolute;bottom:34px;left:50%;transform:translateX(-50%);
  font-family:var(--mono);font-size:.68rem;letter-spacing:.2em;color:var(--muted);
  text-transform:uppercase;display:flex;flex-direction:column;align-items:center;gap:10px;
  opacity:0;animation:fade 1s ease 1s forwards}
.scrollcue i{width:1px;height:46px;background:linear-gradient(var(--acid),transparent);display:block;animation:cue 1.8s infinite}
@keyframes cue{0%{transform:scaleY(0);transform-origin:top}50%{transform:scaleY(1);transform-origin:top}51%{transform-origin:bottom}100%{transform:scaleY(0);transform-origin:bottom}}

/* ---------- marquee ---------- */
.marquee{border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  padding:18px 0;overflow:hidden;white-space:nowrap;margin-top:10px;background:rgba(255,255,255,.015)}
.marquee div{display:inline-block;animation:scroll 26s linear infinite;font-family:var(--display);
  font-weight:700;font-size:1.25rem;text-transform:uppercase;letter-spacing:.02em}
.marquee span{color:var(--muted)}
.marquee b{color:var(--acid);-webkit-text-stroke:0;font-weight:700}
.marquee .dot{color:var(--acid);margin:0 26px}
@keyframes scroll{to{transform:translateX(-50%)}}

/* ---------- section ---------- */
section{padding:100px 0;position:relative}
.sec-head{display:flex;align-items:baseline;gap:18px;margin-bottom:60px}
.sec-num{font-family:var(--mono);color:var(--acid);font-size:.8rem;letter-spacing:.1em}
/* FIXED: section title — was clamp(1.8rem,5vw,3rem) fine but let's tighten */
.sec-title{font-family:var(--display);font-weight:700;font-size:clamp(1.6rem,3vw,2.4rem);
  letter-spacing:-.01em;line-height:1}
.reveal{opacity:0;transform:translateY(40px);transition:opacity .9s cubic-bezier(.16,1,.3,1),transform .9s cubic-bezier(.16,1,.3,1)}
.reveal.in{opacity:1;transform:none}

/* about */
.about-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:60px;align-items:start}
@media(max-width:820px){.about-grid{grid-template-columns:1fr;gap:40px}}
/* FIXED: lead text — was clamp(1.25rem,2.6vw,1.7rem), fine on mobile but large on desktop */
.lead{font-size:clamp(1rem,1.6vw,1.35rem);line-height:1.5;font-weight:400;letter-spacing:-.01em}
.lead .hl{color:var(--acid)}
.about-side{font-family:var(--mono);font-size:.82rem;color:var(--muted)}
.about-side .row{display:flex;justify-content:space-between;gap:14px;padding:14px 0;border-bottom:1px solid var(--line)}
.about-side .row b{color:var(--txt);font-weight:500;text-align:right}

/* research cards */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
@media(max-width:880px){.cards{grid-template-columns:1fr}}
.card{position:relative;padding:28px 24px;border:1px solid var(--line);border-radius:18px;
  background:var(--panel);backdrop-filter:blur(6px);overflow:hidden;transition:transform .5s,border-color .5s}
.card::before{content:"";position:absolute;inset:0;background:radial-gradient(400px circle at var(--mx,50%) var(--my,0%),rgba(125,255,179,.12),transparent 60%);opacity:0;transition:opacity .4s}
.card:hover{transform:translateY(-8px);border-color:rgba(125,255,179,.4)}
.card:hover::before{opacity:1}
.card .ico{font-family:var(--mono);color:var(--acid);font-size:.75rem;letter-spacing:.1em;margin-bottom:18px}
.card h3{font-family:var(--display);font-weight:700;font-size:1.2rem;margin-bottom:10px}
.card p{color:var(--muted);font-size:.9rem}

/* education timeline */
.timeline{position:relative;padding-left:28px}
.timeline::before{content:"";position:absolute;left:4px;top:6px;bottom:6px;width:1px;background:linear-gradient(var(--acid),transparent)}
.tl-item{position:relative;padding:0 0 46px 8px}
.tl-item::before{content:"";position:absolute;left:-28px;top:6px;width:11px;height:11px;border-radius:50%;
  background:var(--bg);border:2px solid var(--acid);box-shadow:0 0 14px rgba(125,255,179,.5)}
.tl-when{font-family:var(--mono);font-size:.74rem;color:var(--acid);letter-spacing:.08em}
.tl-item h3{font-family:var(--display);font-weight:700;font-size:1.2rem;margin:8px 0 6px}
.tl-item p{color:var(--muted);font-size:.9rem}

/* skills */
.skill-wrap{display:grid;grid-template-columns:1fr 1fr;gap:50px}
@media(max-width:820px){.skill-wrap{grid-template-columns:1fr;gap:34px}}
.skill{margin-bottom:24px}
.skill .top{display:flex;justify-content:space-between;font-size:.9rem;margin-bottom:10px}
.skill .top b{font-weight:500}
.skill .top span{font-family:var(--mono);color:var(--acid);font-size:.76rem}
.bar{height:3px;background:rgba(255,255,255,.08);border-radius:3px;overflow:hidden}
.bar i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--acid),var(--cyan));transition:width 1.4s cubic-bezier(.16,1,.3,1)}
.tags{display:flex;flex-wrap:wrap;gap:11px}
.tags span{font-family:var(--mono);font-size:.74rem;padding:7px 13px;border:1px solid var(--line);
  border-radius:8px;color:var(--muted);transition:.3s}
.tags span:hover{color:var(--acid);border-color:var(--acid);transform:translateY(-3px)}

/* contact */
.contact{text-align:center;padding:120px 0}
/* FIXED: contact big text — was clamp(2.4rem,9vw,7rem) — 9vw at 1920px = 172px, 7rem=112px. Way too big. */
.contact .big{font-family:var(--display);font-weight:800;text-transform:uppercase;
  font-size:clamp(2rem,6vw,5rem);line-height:.95;letter-spacing:-.02em}
.contact .big a{transition:color .3s,-webkit-text-stroke .3s}
.contact .big a:hover{color:var(--acid)}
.mailbtn{display:inline-flex;align-items:center;gap:14px;margin-top:46px;padding:16px 30px;
  border:1px solid var(--acid);border-radius:50px;font-family:var(--mono);font-size:.82rem;
  letter-spacing:.08em;color:var(--acid);transition:.4s;position:relative;overflow:hidden}
.mailbtn span{position:relative;z-index:1}
.mailbtn::before{content:"";position:absolute;inset:0;background:var(--acid);transform:translateY(101%);transition:transform .4s cubic-bezier(.16,1,.3,1)}
.mailbtn:hover{color:#04150d}
.mailbtn:hover::before{transform:translateY(0)}
.socials{margin-top:44px;display:flex;gap:26px;justify-content:center;font-family:var(--mono);font-size:.82rem;color:var(--muted)}
.socials a{position:relative;transition:color .3s}
.socials a:hover{color:var(--acid)}

footer{border-top:1px solid var(--line);padding:36px 0;display:flex;justify-content:space-between;
  flex-wrap:wrap;gap:14px;font-family:var(--mono);font-size:.74rem;color:var(--muted);letter-spacing:.05em}
footer b{color:var(--acid)}